RBOB gasoline bears are pricing supply that keeps failing to arrive through the Strait of Hormuz.
Dark tanker transits are masking how much crude is actually reaching US refiners, and the short gasoline trade depends on feedstock assumptions built on estimates.
RBOB gasoline front-month futures held at $3.30/gal as of 2026-08-18, flat on the session even as ICE Brent crude front-month sat at $91.05/bbl and NYMEX WTI front-month at $84.06/bbl.3
The gasoline desk is positioned 63% bearish by directional weight. The logic runs through supply: OPEC+ has signalled higher output, US refining runs remain stout, and products should accumulate into the shoulder season. That view has held for weeks. It has cost anyone who pressed it.1
But the crude that gasoline is supposed to be made from keeps struggling to reach the refineries that need it. Visible commercial traffic through the Strait of Hormuz has plummeted to roughly 15% of pre-war levels, according to JPMorgan. Clandestine flows are estimated at 2.1–2.9 million barrels per day in May, with Piper Sandler's Jan Stuart putting the figure at about 2.9 million barrels per day for that month, including roughly 900,000 barrels of ghost transits with AIS signals switched off. "The ghosts, or clandestine flows, help," Stuart was quoted in the CNN report. Even the analysts counting the flows describe them as a temporary fix.3
The bearish case leans on the idea that product supply is ample because crude supply is ample. Those two assumptions are separating. Vortexa data show the share of outbound laden vessels transiting dark rose to 65.2% in May, up from previous months, meaning the barrels that do move are doing so without traceable signals.3 If you are pricing a product market on crude availability, and 65% of the crude is moving invisible, your inventory model is built on estimates layered on estimates.
What the RBOB short is effectively pricing is a world where refining margins collapse and demand destruction accelerates faster than crude prices rise. That is a real scenario. But it requires the crude to arrive first. A refiner without feedstock does not see margin compression through product weakness; he bids up both the crude and the product because he has no alternative.3
The second signal the short position underweights is the state of strategic reserves. SPR holdings are near multi-decade lows, and inventories are drawing fast across the US system.3 That reduces the buffer that used to absorb supply shocks at the crude level or through product release timing. US oil stocks have stayed below the five-year average for this time of year, and have been for months.1 Reserves can be released once. Rerouted cargoes cannot be rerouted twice.
Lower Chinese imports, strategic reserve releases, rerouting of cargoes, and some demand pullback have absorbed part of the shock from the lost 15–16 million barrels per day of pre-war Hormuz flows.3 But those are one-time tools, not structural offsets, and the market's short position appears to treat them as repeatable.
The agency-level disagreement compounds the problem. OPEC moved forward with its largest production hike in months, citing healthy fundamentals, while the IEA cut its demand view sharply — leaving three major agencies with materially different supply-demand balances.2 If the agencies cannot agree on how much crude is actually moving, the product market is trading on conflicting foundations.
The OPEC+ meeting scheduled for July 5, per OPEC's website, represented the clearest near-term test for the bearish thesis.4 Any confirmed further hikes would give the gasoline bears their headline confirmation. But headline barrels and physical cargoes are different things when 65% of outbound Hormuz traffic is dark.3
The number that would actually confirm or falsify the bearish trade is the monthly dark transit share from Vortexa. It stood at 65.2% in May. If it holds or rises through the autumn, the extra OPEC output is a press release, not a delivered cargo. If it falls back toward 40%, the bears were right, and product builds should follow within two to three weeks of the traffic recovery. Until then, the short is priced on a supply chain that is partly invisible, partly clandestine, and partly dependent on one-time reserve tools that have already been used. That is a thinner foundation than the 63% bearish directional weight suggests.3